POWDER is a roguelike game, which is not a port of an existing roguelike. It is built around replayability and long term ergonomics, not short term learning. Author of this piece of software is Jeff Lait, the PS3 port comes from Bill Blake.

Changes:

The mouse will work again for the onscreen keyboard in SDL builds. (Ilya, Teun Peelen) Description when wearing necro dress code spells servant right. (David Damerell, Andreas Bohm) Vacuum correctly spelled in death message. (David Damerell) “Click on your self to search” rather than Clicking. (Narius Varigor) Starting as cultist will immediately tell you ><0|V|'s whim. (hotpoo)
Loading a save game worshiping ><0|V| will likewise report the whim.
Zapping a hostile wand of create monster will have a chance of the creature turning on you. (hotpoo)
New boon from gods: hostile creatures surrounding you can be smitten. (Indirectly Ambvai)
Earth hammers can be forged into artifact earth hammers with the proper setup. (David Damerell)
Level up hitpoints and magic points are now 2d2+1 rather than 1d4+1, giving a tighter distribution and slight boost to the average. (Teun Peelen)
Earth hammers have an encyclopedia entry. (David Damerell)
When you can move in diagonals you can use the diagonals of the numberpad. (Andreas Bohm)
There is now a SafeWalk mode which stops you from attacking when walking about. You can toggle this by pressing Ctrl when using the arrow keys or binding the Safe Walk command to a button in GBA mode. (Andreas Bohm)
The delete key works the same as the backspace key, a useful feature on Macs whose keyboards lack a backspace. (Roger Bolton)
Wishing for a level teleport no longer uses atoi() so hopefully works on gpsphone. (Roger Bolton)
We now promote room flags to map flags when loading. This way loading the game on the final levels will not turn the levels into floor-diggable and hence suddenly create holes to short-circuit the levels. (Ambvai, debugged by Andreas Bohm)
A case where you could achieve barbarian dress code despite not wearing armour is fixed. (Malte Helmert)
You now gain piety for the barbarian and necro dress codes. (Malte Helmert)
You can no longer move diagonally if both orthogonal directions are blocked by walls.
Spells cast when you have the can dig intrinsic will no longer disintegrate earth elementals. (SparroHawc)Note: While the highscore is kept, save games are never preserved between versions. Please wait until your current character dies before upgrading.

Other release notes from Jeff:

Keeping with POWDER tradition, a long time between releases does not mean there was some huge secret code being worked on that took this long to get ready. It means I was busy with other stuff. That said, there are a good number of fixes in this version. Most important is likely the Safe Walk ability, derived from a patch by Andreas Bohm, which lets non-DS users the ability to avoid accidentally attacking kiwis when they go careening through the hallways. The intent is you can bind it to, say, [L], and then hold that when you want to move safely. If you want [L] to attack, you can change the global option. SDL users may use the ctrl key. Unless they are using vi-keys in which case I’m afraid they are out of luck for now. I can only hope those players believe that Safe Walk is for weaklings.